Long press on your lock screen, tap "Customize," then tap the "+" button to add widgets. Scroll down and choose the "Clock" widget with the size that best suits your needs. You can choose a variety of styles, some of which include AM/PM. See the pic below...
Glance at the status bar: When you wake your iPhone, the time in the status bar will briefly show AM/PM before switching to the full date and time.
This thread has been closed by the system or the community team.
You may vote for any posts you find helpful, or search the Community for additional answers.
Show ampm on clock
Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.